Hoop-machine cutter-head



(No Model.)

.J. HEWIT. HOOP MACHINE CUTTER HEAD.

N01 362,625. Patented MaylO, 1887.

Zfi/nesses. Inventor. ZJfl/SQ/y/Y L em t. g o 299 7' UNITED STATES PATENT Garrett.

JOHN J. HEWIT, OF ALBION, PENNSYLVANIA.

HOOP-MACHINE CUTTER-HEAD.

SPECIFICATION forming part of Letters Patent N0. 362,625, dated IVIay 10, 1887. Application filed July 12,1886. Serial No.20I,841. (N0 model.)

To all whom, ,it may concern.- 7

Be it known that I, JOHN J. HEWIT, a citizen of the United States, residing at Albion, in the county of Erie and State of Pennsylvania, have invented certain new and useful Improvements in Hoop-Machine Cutter-Heads; and I doherebydeclarethefollowing to beafull,clear, and exact description of the invention, such as will enable others'skilled in the art to which it appertains to make and use the same,- reference being had to the accompanying drawings, and to the letters of reference marked thereon, forming part of this specification.

My invention relates to hoop-machine cutter-heads; and it consists in the improvements hereinafter set forth and explained.

My invention is illustrated in the accompanying drawings, in which- Figure 1 is a perspective view of one of my improved hoop-machine cutter-heads complete. Fig. 2 is a perspective view of my improved knife-spacing block for separating the splitting-knives in my improved cutter-head.

Fig. 3 is a perspective of one of my improved splitting-knives. Fig. 4 is a cross-section of same on line 00 a: in Fig.3. Fig. 5 is a perspective of one of my improved hoop-planing knives. Fig. 6 is a View of a modified form of my improved knife-spacing block.

Like letters refer to like partsin all the figures.

In the construction of my improved cutterhead shown, A is the body of the head, having its central opening, B, adapted to fit upon the mandrel of the machine. This body A is provided with four arms, 0 G G O. In these arms 0 O, I insert cutters, as follows: I cut mortises D in the arms 0 O nearly the full width of the head A and of sufficient depth to take in the splittingknives E, Fig. 3, edgewise, as shown in Fig. 1. These knives Eare constructed with the under edge thereof, 0, about one-third thicker than the upper or outer edge, 6, so that the cutting-edge e is somewhat thicker than the outer edge, 6, so as to insure clearance. These knives E are usually five or more in number; but any num ber desired may be used. They are secured in the arms 0 as follows: I make spacing-blocks F, Fig. 2, which are preferably made of cast or wrought metal, planed or otherwise finished to proper size, so that the spaces between the splittingknives E coincide with the width of the hoops to be cut therewith.

In the back end of the block F,I place a small 53 pin, f, or construct thereon a shoulder, f (Shown in Fig. 6.) In case the pin f is used, I construct recesses f in the back sides of the arms 0, as shown in Fig. 1, into which the pins ffit. When, however, I use the block provided with the shoulder f, the shoulderf fits against the back side of the arm 0, the object of the pinfand of the shoulderf on the spacing-block F being to prevent the blocks F from being moved out of place by the centrifugal force exerted thereon. I place the blades E and the spacing-blocks F in the mortises D in the arms 0 G substantially as shown in Fig. 1, where they are secured by the set screws G G in the ends of the arms 0 G. The advantage of this construction is that in case the points 6 of any one or more. of they knives E are broken they can be quickly removed and sharpened or new ones substituted therefor, while, as these knives are now c0nstructedviz., in a solid piece with the planer-bladesthe breaking of one of the points 6 requires the grinding back and resharpening of the entire blade. After fitting the two arms O O with the splitting-knives E E, as described, I cut mortises H H in the opposite arms, 0 O, in which I place planer-knives I I. (Shown in Fig. 5.) These knives are provided with ser rated edges 1, of suitable shape to dress andround the edges of the hoop-blanks separated by the splitting-blades E. The serrations I in the knives I I being of only sufficient depth to properly finish the edges of the hoops, the projecting points 73 thereof, being short, are not easily broken, and when dulled the knife can be readily and easily sharpened without cutting away any great amount thereof. '1 make the serrations in this blade I bf such size and so adjust them in the arms 0 O that the points i of the planer-blade I will exactly follow the splitting-blades E in the arms 0 O asthe head A rotates. The blades I, I secure in the arms 0 O of the head A by set-screws G G in the ends of the arms 0 O.

The operation of my invention is so obvious to those skilled in theart to which this invention appertains that further description thereof is unnecessary.

I am aware that cutter-heads have been heretofore made with composite knives for match- 1 adapted to fit into recesses f in the backs of the [0 ing and grooving machines. Therefore I do cutter-head arms 0, substantially as and for not claim, broadly, a cutter-head constructed the purpose set forth.

in this manner; but In testimony whereof I afiix my signature in Vhat I claim as new, and desire to secure by presence of two witnesses.

Letters Patent of the United States, is-- JOHN J. HEWIP.

The combination, in a hoop-machine cutter- \Vitnesses:

head, of the removable splitting-blades E, with J EDUTHAN WELLs,

the spacing-blocks F, having pins f therein, GEORGE SPAULDING, 

